英语周报七年级2019至2022答案

Paragraph 1A seat beside her was empty, and Dannis occupiedHe ielt a wave of anger swept over him. "Where is mywallet?"he yelled. The black-haired girl glanced up fromher reading, with a confused look on her face. Dannis stoodup, glared at her and shouted, "You stole my wallet! "Thecrowds began to gossip. The girl turned deadly palelooking so restless that words failed her. A strange silencehung in the air. Abruptly, she leaped from the seat.Paragraph 2:The girl ran and Dannis ran after her. After awhile, Dannis finally grabbed her by the arm. At exactlyhat moment, a policeman approached them and askedbout what happened. Dannis hastened to explain it whilethe girl frowned with a shake of her head. After furtherenquiries, the policeman took out a wallet and banded it toDannis,adding that someone had found it in the toiletWhat a mistake he had made! Overwhelmed byyDannis made an apology to thegirl.

23.解:(1)当x<-时,f22r则由f(x)<2得-1 言时,f(x)=2x,由f(x)<2得, 0,6分即a2b2+1>a2+b2则a2b2+2a+1>a2+2+b2,8分则(a+1)2>(a+b)29分即|a+b|<|w+110分

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